Submersible burner



-23 v N. SWINDIN' v 2,611,362

SUBMERSIBLE BURNER Filed March 31, 194'? I nventor A ttorneys- WM ByPatented Sept. 23, 1952 2311,3621 'SIJBMERSIBLE BURNER;

Norman 1 Swindin, London, England Application -Marcli 31, 1947, SerialNm738,361

In GreatiBritain April 3, 1946.

' 6 claims. (01. 126 -360) This, invention. relates to. improvements insubmersibleburners: and has-more particular reference to the typethatare. suppliedw-itht an inflammatory gaseous mixture; and.thateuponignition thereof the resultant hotgases issue below the surfaceofthe-liquid.

Thepresent invention finds. particular appli cationuin the heating andagitation of-theacid? baths employed for the pickling of iron and. steeland in other applications of a like nature.

The object of the present invention. is to-pre:

vent incrustation and obstruction of the orifices from which the heatingand agitatinggasesenter the bath, and to prevent the lowering ;of thelevel of thebath which wouldotherwise take-placedue to evaporation ofthe liquid- It has been ascertained that if a-. suitable amount of wateris. supplied-by anlinlet to the combustion chamber, so, that it .admixeswith the inflamed gases orinthe fiamezpath-ofzthe gas; that thegeneration of steam in.the chamber ensues and theissue of .such steam atthemouth of theburner orifice .orlorifi'ces issuificientinitsaction toprevent concentration ,at said orifices of crystalline or other. matter,which. otherwise. forms and inthe caseoflsteellpicklingl baths:

mainly consists of ferrou sulph'ate, eitheranhydrous or'containing onl'ya smalllproportion oft water'of crystallisatiomand'it also compensates.-

for evaporation of water from the bath;

According to a preferred form .ofltheinvene tion a burner of the typegenerallyconforming to that set forth above is mounted in themainrpickling tank or alternatively accessibly mounted" in an independenttankso as to provide better access for the burner head and valves,whilst its combustion chamber is led into the interior of the tank. Ineither type an extension of the said combustion chamber isarrangedltoissue. fromits tank housing and enter in a horizontal direc'tion in or about the floor level of the acid pickling bath, there beingcirculation of said liquor between the main pickling tank: andthezindependent tank.

In order to keep clean the exit orifices ;o f-f the gases means areprovided for'the generation of steam within the combustionrchamberf of?the burner and conveniently this is-accomplishediby introducing througha suitably disposedgconduit a small stream of water whic-lris vapourisedby the'inflammation of the gases within; th= chamber; 7

The invention is not necessarily restricted.itothe casein which thecombustion chamber" is: housed in a separate ,tankvcommunicating withthe pickling tank by two ports as already described. The burner mayequally well be placed at one end or corner 'of-the bath with a per-Thezinvention consists combustion chamber in advance of gas or flameissue orifices thereof.

The invention further comprisesplacing said.

burner. in an independent but communicating tank adjacent said :mainpickling tank whereby an extension of. thecombustion chamber enters.

andextends into saidpickling tank with conduits between .saidindependent tank and pick:

lingtankfor thermosyphon or forced'flow of liquid from one tank to theother.

In order'that the invention shall be more fully, understood reference ismade to the accompany- 1 ing drawings wherein:

Fig. 1 represents in' part sectional; elevation,

the burnermounted in an acid picklingitank, j

Figs 2 isa part sectional elevation showing the" burner mounted in anindependent adjacent tank but communicating therewith for fiuidfcireculation, I

Fig; 3 is a plan view'of Figure 2.

Referring to the drawings and" to Fig:- 1 the;

' iron picklingtankl is of normal construction;

tom of the bath or otherwise, as desired.

and above. the level of? the pickling liquonzj s a supporting structurel'carrying the 'h'ead plate of "the submersed' burner combustionchamber? '5? The: burner, combustion chamber 5 is' supplied withacombustible mixture through pipeorpipes 6 andelectrical ignition of themixture iseffected by sparking plug 1'; fIhe *gases-fromth'e burnercombustion chambers pass to anextensionof chambergfi" comprising atubeS-Which'is supportedlupon" the basetof thepickling'tank l,- and-apipe i 0 *running centrally "along the -bottom of the tank; said pipe lObeing perforated an H permitting the hot'g'ases of combustion and"steam fromthe added waterto enter the-body" ofliquor; Water isintroduced through conduit 12' and i converted into steam and'passes'away" with the gaseous products-of combustion' to'the liquidtreatedj In operation the supply of water to the-burner has a threefoldeffect, since its ad mission to the'combustion chamber B inhibits or:prevents-the growth "of crystals (in this=case fer roussulphate) aroundthe issue orifices HZby'v saturation of the products of 'combustion'with water vapor and-equally can be adjustedinf. a;- manner-to'equalsubstantially the rate of evapo l by compensating for the losses due"toievapo ration. The forceful issue of "thehot gases" pro videsexcellent agitation of the liquid.

The materials employed for construction of the in a submersible :burnerlmore particularly for use in iron picklingtanks wherein-access to-saidburner isprovidedab0vethe liquor levellof said tank and the combustion;chamber extends into and 1 is submerged. within the body of the liquorheated and. wherein an independent supply of Water is admitted toisaid.

3 said burner and its components are acid resisting and for those partsnot subjected to intense heat, such as the water feed pipe, may be ofmetal coated with. ebonite or like hard vulcanised rubber compound.

In Figs. 2 and 3 an alternative method is shown for mounting thesubmersible burner. In this form an independent tank I4 is providedimmediately adjacent the main iron pickling tank I said tank 14 beingprovided with communicating passages l5 and 16 respectively in the formof conduits between the two tanks, the liquid level 2' in both remainingthereby the same. The burner combustion chamber 5 is in like manner tothe form shown in Fig. 1 provided with a tube 8', which latter passesthrough the conduit 16 into the tank I, and is supported on the base 9'of the tank 1'. Water is admitted to the hot gases by pipe [2. In thisform of the invention the hot liquor in operation circulates between thetwo tanks as indicated by the arrows.

I claim:

1. The method of heating pickle liquors, which comprises burning acombustible mixture, mixing water with the combusted gases to generate awater vapor content in said gases, and discharging the combusted gasesand their water vapor content into a body of the liquors below the uppersurface thereof, and passing the gases and vapors through the liquors tocompensate for the water evaporated from said liquors and preventincrustation in the zone of discharge of the combusted gases.

2. The method of heating and agitating an acid bath of pickle liquorcontaining crystallizable matter and for maintaining the level of liquorin the bath, comprising burning a combustible gaseous mixture to form astream of combusted gases, mixing water with the stream of combustedgases, heating the water thereby and generating steam, and passing thecombusted gases admixed with steam through the bath of liquor below theupper surface thereof in the form of numerous small streams to heat andagitate said liquor, said water being introduced to the stream ofcombusted gases at a rate substantially equal to the rate of evaporationof water from the heated bath to compensate for such evaporation and toprevent concentration of crystalline matter in the zones of said smallstreams.

3. A submersible burner for heating iron and steel pickling liquors,comprising in combination, a combustion chamber arranged to depend intoa body of pickling liquor, means on the upper end of said combustionchamber for supplying a mixture of combustible gases thereto, meansextending within said combustion chamber for igniting said combustiblegases, an extension tube connected to the lower end of said combustionchamber to receive combusted gases therefrom and arranged to extend inthe lower portion of said body of liquor, said extension tube beingformed with a plurality of outlet orifices, and a conduit connected withsaid extension tube in advance of said outlet orifices for delivering asupply of water to said tube for heating by the combusted gases andgenerating steam for discharge with said gases through said orifices.

4. A submersible burner according to claim 3, including main andauxiliary tanks intercommunicating for circulation of said body ofpickling combustible gaseous mixture to the burner for ignition toproduce combusted gases, means for supporting the burner in a submergedposition relatively to the level of liquor in the tank, an extension ofthe burner combustion chamber connected thereto and disposed in the tankbelow the level of liquor therein and having orifices for dischargingcombusted gases from the burner combustion chamber and the extension ofsaid combustion chamber, and means connected to said extension of thecombustion chamber and closely adjacent thereto in heat exchangingrelation and in advance of said orifices for introducing water to thecombusted gases from the combustion chamber and thereby generate steamfor admixture with the combusted gases and discharge with the combustedgases from said orifices.

6. Apparatus for heating and agitating iron and steel pickle liquors,comprising a tank to contain a bath of pickle liquor, a burner having acombustion chamber, means for supplying a combustible gaseous mixture tothe burner for ignition to produce hot combusted gases, means forsupporting the burner in a submerged position relatively to the level ofliquor in the bath, an extension connected to the combustion chamber ofthe burner to receive combusted gases therefrom and disposed in thelower portion of the tank below the level of liquor therein and havingorifices distributed along its length for discharge of the combustedgases into the bath of liquor, and means connected to the combustionchamber extension closely adjacent to the burner and in advance of theorifices for introducing water to the combusted gases to generate steamfor admixture with the combusted gases and for discharge of the steamand combusted gases through said orifices.

NORMAN SWINDIN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 160,178 Gething et al Feb. 23,1875 414,800 Edminster Nov. 12, 1889 517,297 Reiss Mar. 27, 1894 959,195Au Werter May 24, 1910 1,013,635 Bardill' Jan. 2, 1912 1,019,965 KellyMar. 12, 1912 1,667,122 Kilgus et al Apr. 24, 1928 1 1,973,456 WilsonSept. 11, 1934 2,055,211 Yoder Sept. 22, 1936 2,204,051 Ritts et a1 June11, 1940 2,358,302 Brosius Sept. 19, 1944 2,375,840 Ekstrom May 15, 1945FOREIGN PATENTS Number Country Date Great Britain NOV. 22, 1928

